Ligand free Ullmann coupling reactions of aryl halides catalyzed by Pd/C were studied in O/W Triton X10 microemulsion(ME) in comparison with biphase systems.

Recent advances in the palladium-catalyzed Ullmann-type coupling of aryl halides in- cluding reductive coupling and oxidative coupling reactions have been reviewed.

The reductive coupling of aryl halides to form the corresponding biaryls was effected with high selectivity in water,using formic hydrazide as a reducing agent in the presence of a catalytic amount of Pd/C.

It is an important method to form C Ar—N by palladium-catalyzed amination of aryl halides.

With the application of sterically hindered, electron-rich alkylphosphines, this reaction is now applicable to a broad range of aryl halides.

Firstly, a cyanation process of aryl halides with K4[Fe(CN)_6]-3H_2O as the cyanating reagent was studied.

This article reviews three kinds of methods for manufacture halogenated aromatic amine by reduction of halogenated aromatic nitro-group compounds,and the strong and weak points of the three reduction methods are pointed out.

This article reviews three kinds of methods for manufacture halogenated aromatic amine,and the strong and weak points of the three reduction methods are pointed out.

Study of the trifluoromethylation of aromatic halides;

In the presence of copper(Ⅰ) iodide as the catalyst and under the protection of inert gas,aromatic halides including bromobenzene,iodobenzene,iodotuluene and iodonitrobenzene reacted with sodium trifluoroacetate to give the corresponding trifluoromethylated compounds in moderate to good yields.

Ni-B/SiO_2 amorphous catalyst was employed in hydrogenation of haloaromatic nitrocompounds to haloaromaticamine.